Incompatible Timesharing System - History, Development, Restoration
summary
An operating system for PDP-10s developed at MIT from the late 1960s through 1990, ITS emphasizes openness (no passwords, full source) and interactive debugging via a system debugger UI; Emacs originates there and ITS influenced GNU. A restoration pipeline boots from virtual tape, creates a filesystem image and builds 300+ programs from source, fixes Y2K and other bugs, and adds emulator drivers (KL10, CM/HC, FPGA) and networking so ITS runs again; missing items: original PDP‑6 ITS image and several device simulators (robot, camera).
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chapters (26)
- 0:00Intro
- 0:50Overview
- 1:13What is it
- 1:49Why
- 3:11History
- 5:33Background
- 7:22Project Mac
- 10:57Development
- 13:46lisp
- 14:52Maxima
- 15:45TrueGlue
- 16:28Logo
- 17:35Model
- 18:18Clue
- 20:49Games
- 22:02Smaller computers
- 23:24Features
- 26:02Decline
- 26:57Timestamps
- 27:50Versions
- 30:19Richard Stallman
- 31:13A new hope
- 32:31Restoration
- 33:30Projects
- 35:29Living Computers Museum
- 36:13Conclusion
